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| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2019-06-22 19:07:05 +0300 |
|---|---|---|
| committer | Masahiro Yamada <yamada.masahiro@socionext.com> | 2019-07-01 04:03:40 +0300 |
| commit | c2341e2a4f58d8e27d89c5edfefdaa52547f792d (patch) | |
| tree | d9663a355afa1589a97ab87c3b843442ee5edccc /scripts/Kbuild.include | |
| parent | 93f31bbda43603da1e8af06667b45b410c6c897a (diff) | |
| download | linux-c2341e2a4f58d8e27d89c5edfefdaa52547f792d.tar.xz | |
kbuild: save $(strip ...) for calling if_changed and friends
The string returned by $(filter-out ...) does not contain any leading
or trailing spaces.
With the previous commit, 'any-prereq' no longer contains any
excessive spaces.
Nor does 'cmd-check' since it expands to a $(filter-out ...) call.
So, only the space that matters is the one between 'any-prereq'
and 'cmd-check'.
By removing it from the code, we can save $(strip ...) evaluation.
This refactoring is possible because $(any-prereq)$(cmd-check) is only
passed to the first argument of $(if ...), so we are only interested
in whether or not it is empty.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to 'scripts/Kbuild.include')
| -rw-r--r-- | scripts/Kbuild.include | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include index 6f9e88716ff4..222fd1d7d3ae 100644 --- a/scripts/Kbuild.include +++ b/scripts/Kbuild.include @@ -228,12 +228,12 @@ make-cmd = $(call escsq,$(subst $(pound),$$(pound),$(subst $$,$$$$,$(cmd_$(1)))) any-prereq = $(filter-out $(PHONY),$?)$(filter-out $(PHONY) $(wildcard $^),$^) # Execute command if command has changed or prerequisite(s) are updated. -if_changed = $(if $(strip $(any-prereq) $(cmd-check)), \ +if_changed = $(if $(any-prereq)$(cmd-check), \ $(cmd); \ printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:) # Execute the command and also postprocess generated .d dependencies file. -if_changed_dep = $(if $(strip $(any-prereq) $(cmd-check)),$(cmd_and_fixdep),@:) +if_changed_dep = $(if $(any-prereq)$(cmd-check),$(cmd_and_fixdep),@:) cmd_and_fixdep = \ $(cmd); \ @@ -243,7 +243,7 @@ cmd_and_fixdep = \ # Usage: $(call if_changed_rule,foo) # Will check if $(cmd_foo) or any of the prerequisites changed, # and if so will execute $(rule_foo). -if_changed_rule = $(if $(strip $(any-prereq) $(cmd-check)),$(rule_$(1)),@:) +if_changed_rule = $(if $(any-prereq)$(cmd-check),$(rule_$(1)),@:) ### # why - tell why a target got built |